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Metal rich metallaboranes of group 9 transition metals
Rosmita Borthakur, Rini Prakash, Purbasha Nandi,
Published in Elsevier B.V.
2016
Volume: 825-826
   
Pages: 1 - 7
Abstract
We report the synthesis and structural characterization of moderately air stable metal rich metallaboranes of iridium. Treatment of [Cp*IrCl2]2with BH3·thf at high temperature led to the isolation of a trimetallic [nido-5-(Cp*Ir)3B7H11], 1. Compound 1 is isoelectronic and isostructural with decaborane-14 where three BH units in [B10H14] have been replaced by Cp*Ir fragments. As far as we are aware, 1 is the first example of a iridadecaborane having three metals. In addition to the formation of 1, a change in the reaction conditions enabled us to isolate a 7 sep [(Cp*Ir)3B4H4], 2. The geometry of 2 can be viewed as a condensed polyhedron composed of Ir3B3octahedron capped by a BH unit. All the compounds have been characterized by IR and1H,11B, and13C NMR spectroscopy in solution, and the solid-state structures were established by X-ray crystallographic analysis. Quantum-chemical calculations by DFT methods for compounds 1 and 2 showed reasonable agreement with the experimentally observed structural parameters. The large HOMO–LUMO gaps are consistent with the high stabilities of the iridium clusters compared to their known Rh and Co analogues. © 2016 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Organometallic Chemistry
PublisherData powered by TypesetElsevier B.V.
ISSN0022328X
Open AccessNo
Concepts (16)
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    Boron
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    Boron compounds
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    Iridium
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    Nuclear magnetic resonance spectroscopy
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    Quantum chemistry
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    Transition metals
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    X ray crystallography
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    13C NMR SPECTROSCOPY
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    DECABORANES
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    IRIDABORANE
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    Quantum chemical calculations
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    Solid-state structures
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    Structural characterization
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    Structural parameter
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    X-ray crystallographic analysis
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    Iridium compounds